Portal 2 is a first-person puzzle-platform video game developed and published by Valve Corporation. It is the sequel to the 2007 game Portal and was released in April 2011 for Microsoft Windows, OS X, Linux, the PlayStation 3, and the Xbox 360. The retail versions of the game were published by Electronic Arts, while online distribution of the PC versions is handled by Valve's content delivery service Steam. Portal 2 was announced in March 2010, following a week-long alternate reality game (ARG) based on new updates to the original game. Before the game's release on Steam, the company released the Potato Sack, a second multi-week alternate reality game, involving 13 independently developed titles which culminated in a distributed computing spoof to release Portal 2 several hours early.
CPU: 3.0 GHz Pentium 4, Dual Core 2.0 (or higher) or Athlon 64 X2 (or higher)
CPU Speed: 3.0 GHz Pentium 4, Dual Core 2.0 (or higher) or Athlon 64 X2 (or higher)
RAM: 1 GB XP / 2 GB Vista & 7
OS: Windows 7 / Vista / XP / 2000
Video Card: Video card must be 128 MB or more and should be a DirectX 9-compatible with support for Pixel Shader 2.0b (ATI Radeon X800 or higher / NVIDIA GeForce 7600 or higher / Intel HD Graphics 2000 or higher).
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